MLB Prop Bets: Seattle Mariners vs Tampa Bay Rays (August 8, 2026)
The Tampa Bay Rays (69-46) face the Seattle Mariners (56-61) at T-Mobile Park on Saturday at 9:50pm (ET). Let's take a look at the MLB Prop Bets for the matchup. Griffin Jax is the probable pitcher for the Rays, while George Kirby is the probable pitcher for the Mariners. The Mariners are favored to win at -120, while the Rays are at -101. The total runs line is set at 7.0, with OVER at -122 and UNDER at +102.
- The Rays (+175) have a 65-50 Run Line record this season, while the Mariners (-215) hold a record of 47-70.
- The Rays have a 50-61-4 O/U record this season (meaning 50 games have gone over the total runs line, 61 have gone under and four have resulted in a push). The Mariners have a 57-52-8 O/U record.
Scoring Insights
- The Rays are averaging 4.5 runs per game this season (16th in the league). Comparatively, the Mariners are averaging only 3.9 (29th).
- In the field, the Rays are allowing 4.1 runs per game this season (8th in the league), while the Mariners are allowing an average of 4.1 runs (7th).
Let's take a look at how these teams perform in some other key statistical areas.
Batting Insights:
Batting Average
- Looking at their batting averages this season, the Rays are at an impressive .258 (ranking 2nd in the Major leagues), while the Mariners are batting an underwhelming .229 (30th).
Home Runs
- In terms of total home runs this season, the Mariners have hit 135 (15th in the Major Leagues). Meanwhile, the Rays have managed 118 (T23rd).
Runs Batted In
- Finally, looking at their runs batted in, the Rays have recorded 487 RBIs to rank 18th in the MLB this season. Comparatively, the Mariners have recorded 443 RBIs to rank 29th.
Pitching Insights:
Earned Run Average
- The Mariners have an earned run average of 3.81 this season (9th in the Majors), while The Rays have an ERA of 3.71 (6th).
Strikeouts
- Turning our attention to total strikeouts, the Rays have recorded 943 this season, ranking 21st in the MLB. Meanwhile, the Mariners rank 11th for total strikeouts, recording 999.
Opponent Batting Average
- Opponents are batting an average of .243 against the Mariners this season (16th in the Major Leagues). Comparatively, the Rays' opponents are at .229 (5th).
First Innings Moneyline
- Here are their first innings moneyline records in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Rays | 29-23-63 | 15-11-33 | 14-12-30 | 21-18-37 | 8-5-26 | 0-0-0 | 3-3-4 |
| Mariners | 25-30-62 | 16-14-30 | 9-16-32 | 24-23-50 | 1-7-12 | 0-0-0 | 3-4-3 |
Lead After Three Innings
The Rays are +105 to lead after three innings, while the Mariners are -135.
- Here are their records after the first three innings in 2026.
| Total | Home | Road | Favorite | Underdog | Neutral | Last 10 | |
|---|---|---|---|---|---|---|---|
| Rays | 46-36-33 | 24-19-16 | 22-17-17 | 35-26-15 | 11-10-18 | 0-0-0 | 5-3-2 |
| Mariners | 44-45-28 | 26-20-14 | 18-25-14 | 36-36-25 | 8-9-3 | 0-0-0 | 3-6-1 |
NRFI/YRFI
The NRFI market is paying -135 and the YRFI is paying +105.
- The NRFI is 59-56 in Rays games this season. The Mariners have a 57-60 NRFI record.
Last Time They Met
The Rays recorded a 2-1 victory over the Mariners at T-Mobile Park yesterday. Julio Rodriguez was unstoppable in that matchup, hitting a home run, a single and recording an RBI. That result snapped the Mariners' four-game winning streak against the Rays at T-Mobile Park.
